An Encrypted Communication System Based On Dynamically Reconfigurable Computing

With the rapid progress of modern communication technology, people arebecoming more and more focused on secured communication. Information securityhas become an important research topic. As the foundation of modern communicationsystem, Baseband communication is typically composed of encoding/decoding,encryption/decryption. Obvious, encryption is the basis of secured communication.DES and AES are the two most popular encryption algorithms. For a generalpurpose Baseband system that needs to support both standards, implementing them insoftware will cause low performance while mapping them both onto hardware willcause a waste of hardware resources and thus increase cost.Based on dynamic reconfiguration, this thesis proposes a Baseband system thatsupports both DES and AES with a same hardware accelerator. The dynamicreconfiguration capability allows a system to be reconfigured while part of it is stillworking without being disturbed. Our goal is to design a prototype of the system. Thesystem includes traditional compression and encoding hardware cores, but it also hasthe capability to dynamically swap DES and AES core on demand. The two cores aremapped to the same area on the FPGA. The main contributions of our work include:1) Improving the AES algorithm with secured S-box, and higher performance2) Implement a dynamic reconfigurable platform, which can change bothcomputational cores and communication pattern.3) Using the platform to implement the Baseband system.The results of our work show that the prototype can meet the changing demandof the requirement to flexibly reconfigure encryption cores. Our work is a valuableattempt towards a fully general purpose, reconfigurable Baseband system supportingdifferent standards.